A boy tosses a football to Los Angeles Chargers defensive end Joey Bosa, right, for an autograph after the team’s NFL football practice, Sunday, July 29, 2018, in Costa Mesa, Calif. (AP Photo/Jae C. Hong)

No, not because of fans in the bleachers, or players jawing at each other from the sideline. When the Chargers start their third practice of training camp, they’ll do so with pads on. And that, according to Casey Hayward, should produce some more noise.

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Coach Anthony Lynn likes what he’s seen out of his players through the first two days of training camp, but said Sunday that he didn’t want to “jump the gun” on his early impressions. That said, it was hard for him not to be get excited.

Take, for example, Kyzir White. Drafted in the fourth round this past spring, the safety-turned-linebacker drew effusive praise from Lynn, who pointed out the defender’s speed, explosiveness and instincts. At 6-foot-2, 218 pounds, the West Virginia has potential to blossom into a powerful hitter.

“He’s a headhunter,” Lynn said. “If a guy like that looks good in shorts, I can’t wait to see him in pads.”

The Chargers’ established stars are looking forward to Monday too. Defensive end Joey Bosa, who capped his second season with his first Pro Bowl nod, called padded practices “more efficient,” allowing him to try out a wider array of pass-rushing moves.

“I feel like it’s a little dangerous out here, running full speed with nothing on,” said Bosa, voted the 37th-best player in the latest NFL Top 100. “It’s still pretty much full speed. Once you get the pads on, you can really see where you’re at with your pass-rush technique, because all the power moves come into play.”

Because he used his offseason work on his athleticism rather than on football drills, the 23-year-old has spent the first two days of camp focusing on fundamentals like staying low in his stance, or lining up correctly.

“It takes a week or so to get back in the swing of things,” Bosa said.

Running back Melvin Gordon also admitted to being a bit rusty.

“A lot of moves, I can see me doing but they feel a little forced,” he said. “I didn’t feel smooth. … Everything feels forced right now, but a couple of days, I’ll be all right.”

INJURY REPORT

A day after Austin Roberts limped off the field at Jack Hammett Sports Complex, Lynn confirmed the worst: the undrafted rookie had torn his ACL.

“We’re going to miss him,” Lynn said Sunday. “He was a young prospect that had some speed at that position, and was coming along fine.”

The son of Chargers running back coach Alfredo Roberts, the 22-year-old caught 35 passes for 500 yards and three touchdowns at UCLA. Undrafted this past spring, Roberts signed with the Chargers in late May after being invited to work out during the team’s rookie minicamp.

Roberts might have been a longshot to make the final 53-man roster, even given the Chargers’ needs at his position, but his season-ending injury robs him of a chance to become a preseason surprise.

The Chargers didn’t lose any other players to injury on the second day of training camp, but Lynn said a few dealt with dehydration.

CAMP NOTES

Lynn said rookie Dylan Cantrell, a sixth-round pick, has improved more than any other Chargers receiver this offseason. … The Chargers signed offensive guard Erick Wren, a former Oklahoma standout who made the All-Big 12 first team in 2017.

Jack Wang covers the Chargers, the latest NFL team to relocate to Los Angeles. He previously covered the Rams, and also spent four years on the UCLA beat, a strange period in which the Bruins' football program often outpaced their basketball team. He is a proud graduate of UC Berkeley, where he spent most of his time in The Daily Californian offices in Eshleman Hall — a building that did not become earthquake-safe until after his time on campus.